The effect of the size of structural bulk inhomogeneities on the specular transmittance of polymer films

Hermann H. Neidlinger

doi:10.1117/12.936689

23 February 1987 The effect of the size of structural bulk inhomogeneities on the specular transmittance of polymer films

Hermann H. Neidlinger

Author Affiliations +

Proceedings Volume 0692, Materials and Optics for Solar Energy Conversion and Advanced Lightning Technology; (1987) https://doi.org/10.1117/12.936689
Event: 30th Annual Technical Symposium, 1986, San Diego, United States

Abstract

This paper will be confined to the effect of optical inhomogeneities in polymer films on the scattering or specular transmittance of light. Potential causes for the presence of scattering entities in the bulk phase of polymers will be discussed. It will be shown that practical transmittance measurements are greatly influenced by the angular width of the instrument receptor aperture. The choice of larger receptor apertures will tend to include some of the scattering at small angles due to large inhomogeneities in the measurement of specular transmittance. As a consequence, the transmittance measured is not necessarily increased by reducing the size of the inhomogeneities in the polymer films, but there is a critical size when the specular transmittance is a minimum.

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Hermann H. Neidlinger "The effect of the size of structural bulk inhomogeneities on the specular transmittance of polymer films", Proc. SPIE 0692, Materials and Optics for Solar Energy Conversion and Advanced Lightning Technology, (23 February 1987); https://doi.org/10.1117/12.936689

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